Film lubricating device



June 23, 1936. 1 RACKETT 2,044,810

FILM LUBRICATING DEVICE Original Filed Aug. 20, 1931 In were tar; 6' eraid 17/2 ae'lr'eea A tgs.

Patented June 23, 1936 UNITED STATES 2,044,810 PATENT OFFICE FILM LUBRIOATING DEVICE Original application August 20, 1931, Serial No.

Divided and this application April 21, 1933, Serial No. 667,283

3 Claims. (Cl. 881'l) yet efiective film lubricating device which can be conveniently mounted in the limited space within a photographic camera, and to provide a device of this kind which can be conveniently adjusted 15 and permits easy threading of the film therethrough. In another aspect of my invention, it is one of its objects to provide a device of" the type referred to which permits lubrication of superposed films traveling together through cine- 20 matographic apparatus. 1

Other objects and-advantages of my invention will be apparent from the following description, by way of example, of a typical embodiment thereof, illustrated by a drawing in which:

25 Fig. 1 is a plan view of the film movement support 01' a photographic camera with devices according to the invention mounted thereon;

. Fig. 2 is a front elevation viewed from the left of Fla.

30 Fig. 3 is a side elevation viewed from the top of Fig. 1; and

' Fig. 4 is a front elevation viewed from the bottom of Fig. 1. g

The herein described embodiment of the in- 35 vention is shown as incorporated in a camera for taking cinematographic records in natural colors which is described indetail in the above mentioned application Serial No. 558,193, and comprises a central supporting block 5| having 40 flanges 8|, 82 upon which film movements (not shown) are mounted, which advance films B, R and G within planes perpendicular to the flanges.

As shown in the drawing, films B and R are superposed and advanced adjacent to fiange U2,

. 5 whereas film G is similarly positioned near fiange ll. Each film movement has an aperture plate I, I! respectively, and a back plate 83, 54, respectively, between which the films are guided and which extend at right angles from flanges 50 8|, 8! as shown in Fig. 1. 4

The aperture plates 5i and I! support the oiling devices according to the present invention which consist substantially of felt pads arranged to touch the films slightly along their perforated 55 margins and apply a slight amount of oil to them as they enter the movements.

Pad holders Ill and 2 (Figs. 1, 2 and 4) are secured to the aperture plates respectively, the holders, with the aid of clamping plates H3 and 60 screws ill, supporting U-shaped felt pads H5 The present apand ill. The aperture containing superposed films requires two oil pads, one for each film, and has therefore in addition an outer pad holder 8 with pad ii'l fastened thereto by means of clamp plate 9 and screws l2! (Figs. 1 and 2). 5

The outer pad holder ill has an arm I25 journaled on screw pin in and forced towards the film by spring I21. This arm can be swung away from the films by means of handle I28 and its proper distancefrom the film is maintained with 10 the aid of two positioning pins Ill and I22 which screw into holder III at I23 and I2! and whose length can be adjusted according to requirements.

The films are threaded through'their respective movements in the usual manner, whereupon film G contacts with pad iii to which a suitable lubricating agent is applied, and is continuously oiled prior to entering its film movement in the direction indicated.

Films R and B are inserted between pads H8 and Ill by lifting pad holder ill, and are then threaded together through the second film movement. Moving in the direction indicated, each film is lubricated along its margins before it en- 25 ters the movement.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

I claim:

1. Motion picture apparatus comprising a film gate with film confining means and a unitary pad of lubricant carryingmaterial placed in the film path before, and independently of said confining means substantially transversely of the film and having two extensions touching and thereby uniformly lubricating the passing film along its margins prior to entering said gate.

2.- Motion picture apparatus comprising a film gate with film confining means and a support fixed to said film gate independently of saidconfining means, a lubricating pad mounted on said support, a second support swingingly asso-' ciated with said gate, a lubricating pad mounted on said second support, means for distancing the two pads, and means for pressing the supports toward a film progressing intermediate thereof.

3; In a motion picture machine, a film gate 

